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The following frequency histogram presents the final grades of a random sample of 100 college students. 33 30- 27- 24 21 - 18 Frequency 15

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The following frequency histogram presents the final grades of a random sample of 100 college students. 33 30- 27- 24 21 - 18 Frequency 15 12 9 5. 3 x 63 66 69 72 75 78 81 84 87 90 93 96 Final Grade Score(a) How many classes are there? There are E] classes. (b) What is the class width

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